Eraser-guard.



L. W. FABER.

ERASER GUAIID.

APPLICATION FILED NOV. 16. I917- lfi? 6,51 1; Patented Aug. 20, 1918.

' ATTORNEY LOTHAR W. FAIBER, OF NEW YORK, N. 'Y., ASSIGNOR T EBERHARID FABER PENOIL COMPANY, OF BROOKLYN,-NEW YORK, A CORPORATION OIE NEW YORK.

ERASEB-GUARD.

Application filed November 16, 1917. Serial No. 202,360.

To a llgwhom it may concern:

Be it known that I, Lo'rHAR W. FABER, a

citizen of the United States, residing in the borough of Manhattan, city, county, and State of New York, have invented certain new and useful Improvements in Eraser- .Guards. of which the following is a specification.

My invention relates to a device for securing and guarding a rubber eraser such as is commonly atiixed at the end of a lead pencil.

.Such erasers commonly are mounted in a ferrule or socket at the "end of the pencil to extend rearwardly therefrom. With the usual construction, the eraser only extends a comparatively short distance, such as one-" quarter of an inch from its holder, as it is necessary for the same to be fairly rigid, and if the effective length of the eraser were made longer, it would be too flexible for effective use and would be likely to break oil in use. Accordingly, the usefulness of the eraser is limited by its short effective length, since it wears down rapidly in use and sometimes is worn down entirely to the rear edge of its holder before the pencil or. other device to which it-is attached has entirely outlived its usefulness.

My invention is intended to overcome this difficulty by providing a mounting from which an eraser is intended to extend a considerable distance, such, for example, as onehalf of an inch, a slidable sleeve or guard being provided to extend over the eraser and its mounting and the pencil or other device to which it is secured. Means are provided on or adjacent to the eraser holder for holding the sleeve or guard in adjusted position by friction and preferably to permit the sleeve to be moved forwardly only. With this arrangement, the sleeve may be adjusted so that the eraser extends 'rearwardly only a short distance beyond the end of the sleeve, so thatthe sleeve forms a bearing for the eraser, and the rigidity of the efiective portion of the eraser is the same as if the fixed holder for the eraser extended as far alongsidethe eraser as does the sleeve in my construction. When the eraser has become somewhat worn in use, the sleeve may be moved forward slightly and this adjustment made from time to time until the eraser has been used up;

In order that a clearer understanding of my invention may be had, attention is hereby directed to the accompanying drawings forming part of this application and illustrating certain embodiments of my invention. In the drawings, Figure 1 represents a side elevation of a lead pencil provided with my invention, Fig. 2 is an enlarged longitudinal section through the eraser holder and sliding sleeve, the eraser and a portion of the pencil being shown in side elevation, Fig. 3 is a longitudinal section on line 3-3 of Fig. 2, Fig. 4 is a longitudinal section similar to Fig. 2 but of a modified form of my invention, and Fig. 5 is a longitudinal section taken on line 55 of Fig. 4. Referring to Figs. 1 to 3 of the drawings, a cylindrical support, such as the lead pencil l, is provided at its rear end with a-tubular eraser holder 2 having aportion 3 extendin rearwardly beyond the rear end of the penci 1 and adapted to hold the cylindrical rubber eraser 4. The portion 3 of the eraser holder may be provided with grooves and ridges, as shown at 5, to holdthe eraser firmly therein, as is common. The forward edge of the holder 2 is serrated to form a series of spring tongues 6 which extend around the periphery of the holder, are pointed at their ends and slantforwardly and outwardly, as shown. The holder 2 may be secured to the pencil or other support in any desired manner, as by pressing the metal of the holder into the wood of the pencil with a prick-punch at two or more points, as is indicated at 7.

The cylindrical rubber eraser at extends a considerable distance beyond the rear end of its holder 2, as shown, when first mounted in position. The sleeve or guard 8 is adapted to he slipped over the rear end of the eraser and to cover the holder 2 and extend forwardly beyond the points of the spring tongues 63. The latter press against the in ner surface of-the sleeve 8 and hold the same; frictionally in adjusted position, in which the erase may extend only a short distance rearwardly from sleeve 8. When the rubberbecomes worn, the sleeve may be moved forwardly the desired distance, but rearwardmovement of .the sleeve is resisted by the. sharp points of tongues 6 biting into the inner surface of'the sleeve, as is indicated in Fig. 3. The sleeve 8 is preferably formed *of a comparatively soft substance, such "as carboard, or the like. This preferred arterfere with the operation oi the erase" any time. 7

A modified construction is shown in Figs. and 5, in which the spring tongues 6 are formed oi a member which is not integral with the eraser holder, As there illustrated, the pencil or ot or support 1 is given a somewhat reduced diameter for a short distance adjacent its rear end, so as to provide a peripheral shoulder 9. The member 10, haying the forwardly directed spring tongues 65, is slipped into position over the rear oi: the pencil 1 until the forward portion of memher 10 adjacent the bases of the spring tongues comes into contact was shoulder 9, member 16 being; slightly bent to provide 'a' portion adapted to seat against shoulder 9. The member 2'", comprising the eraser holder, is then slid into position over the rear end of the pencil until its forward edge abuts against the rear edge 01 membe 10, asv shown at'll. Member 2 is formed to provide a socket for the eraser in the same manner as described in connection with the first form of my device. After membe 2 has been positioned, it may be secured to the Wood of the pencil o support, by forcing the metal of the same into the Wood with a prick-punch, a shQWn at 7 ith this construction, member 10 is held in position by abu ting against shoulder 9 in one direction and against the forward edge of member 2 1n the other direction.

One advantage of this construction is that will he hrious my inv is not stricuy -m1ted to the exact e ing an eraser, to extend rearwardly therer from, and a sleeve of soft material adapted to he slid iorwardly over member and eraser, andto be i'rictionally engaged by said tongues.

2. In an eraser mounting, the combination of a cylindrical support, a tubular member secur d fixedly thereon, to provide socket for an eraser, to extend rearwardly therefrom from the end of said support, said member having" its forward edge serrated to provide sharp pointed spring" tongues inclined forwardly and outwardly from the surface of said support, and sleeve of oft material adapted to he slid forwardly over toe member and eraser and to be frictionally engaged by said tongues.

3. In eraser mounting, the combination of a cylindrical support, means for holding an eraser to eetend rearwardly therefrom and f om the end of said support, and to provide spring projections extending outwardly and forwardly from the surface of said support, said means being fixedly secured to said support, and a sleeve of soft material adapted to he moved over said support, means, and the extended eraser, in a forward direction, and to be frictionally engaged by said projections.

This specification signed and witnessed this l l' h day of November, 191?.

itnesses: 

